Upgrade the hydration performance of your pack or Amphipod belt with these easy-access SnapFlask bottles that hold your favorite performance fluid. SnapFlask module technology features easy release and snap-in replacement to the docking base included for effortless access. Docking base/module attaches securely to Amphipod belts and any 1.5 to 2-in. wide belt or strap on a backpack or waistpack. Docking base allows vertical or horizontal attachment positions. Each flask has a wide, 35mm mouth that makes it easy to fill and clean. Includes two 10.5-fl. oz. bottles for a total of 21 fl. oz. Polyethylene is 100 BPA free.